Definitely not perfect, but it at least fit my broken part to start with. Will look to improve if it doesn't work for a while.
This should work on any Mk1 Ford Focus Hatchback, at least the North American versions. B4V0A and POM are printed on the original. I can't find the actual part number though.
Potential improvements:
Originally printed in Overture Sparkle Blue PETG with 0.2mm layer height. You definitely need supports, I printed with the “wedge” on the bottom and enabled tree supports. Didn't come out super pretty, there might be a better way.
Loosely inspired by https://www.thingiverse.com/thing:4864137 and https://www.printables.com/model/474994-trunk-cover-lanyard-snap-ford-focus-st/
The author marked this model as their own original creation.